Superalloys under the Effect of Hot Corrosion and Role of HVOF Coatings - A Review

2016 ◽  
Vol 4 (2) ◽  
pp. 30
Author(s):  
AGNIHOTRI ATUL ◽  
Singh KALSI Sukhminderbir ◽  
◽  
Keyword(s):  
Hot Corrosion ◽  
Hvof Coatings

Studies on the role of HVOF coatings to combat erosion in turbine alloys

2018 ◽  
Vol 5 (1) ◽  
pp. 3130-3136 ◽  
Author(s):  
N.D. Prasanna ◽  
C. Siddaraju ◽  
Gagan Shetty ◽  
M.R. Ramesh ◽  
Madhusudhan Reddy
Keyword(s):  
Hvof Coatings

scholarly journals The Role of Chromium in the Hot Corrosion of Metals

2019 ◽  
Vol 16 (49) ◽  
pp. 271-282 ◽  
Author(s):  
Robert A. Rapp ◽  
Nobuo Otsuka
Keyword(s):  
Hot Corrosion

Hot corrosion of alumina

1993 ◽  
Vol 8 (8) ◽  
pp. 1964-1971 ◽  
Author(s):  
M.G. Lawson ◽  
F.S. Pettit ◽  
J.R. Blachere
Keyword(s):  
Electron Microscopy ◽  
Hot Corrosion ◽  
Electron Probe ◽  
Impurity Content ◽  
Reaction Products ◽  
Weight Changes ◽  
Experimental Conditions ◽  
Electron Probe Microanalyzer ◽  
Scanning Electron

The hot corrosion of single crystal and polycrystalline aluminas has been investigated in SO2–SO3–O2 environments and in the presence of molten Na2SO4-based deposits at temperatures of 700 and 1000 °C. The effect of microstructure and impurities on the corrosion has been emphasized. Weight changes and wetting angles were determined, and the evolution of the morphology of the exposed substrates and the reaction products was investigated in detail. The corrosion was small under the conditions of this study and generally increased with the impurity content of the polycrystalline aluminas. Based on the experimental results, particularly those obtained by electron microscopy and microanalysis using the SEM/EPMA (scanning electron microscope–electron probe microanalyzer), mechanisms are proposed for the corrosion of polycrystalline aluminas which emphasize the role of the silicate impurities and the synergy of their corrosion with that of the alumina grains. As a result, the alumina grains were dissolved by acidic fluxing under the acidic and the basic experimental conditions.

Role of tantalum in the hot corrosion of a Ni-base single crystal superalloy

2015 ◽  
Vol 98 ◽  
pp. 585-591 ◽  
Author(s):  
J.X. Chang ◽  
D. Wang ◽  
T. Liu ◽  
G. Zhang ◽  
L.H. Lou ◽  
...  
Keyword(s):  
Single Crystal ◽  
Hot Corrosion ◽  
Single Crystal Superalloy
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